Agricultural implement



April 25, 1933. w. SCHIRMER 1,906,107

AGRI CULTURAL IMPLEMENT Filed July 15, 1930 /n vepfor: Wmmn/o Patented Apr. 25, 1933 UNITED STATES wnnnm SCHIRMER, or LEIZPZIG, GERMANY, nssronon r0 GERMANY AGRICULTURAL IMPLEMENT Application filed July 15, 1930, Serial No.

I have filed applications in'Germany April 18, 1929; in Czechoslovakia June 7, 1930, and in France June 10, 1930.

My invention relates to agricultural implements and more particularly to means adapted to the frames of such implements for connecting thereto tools such as plough shares.

It is an object of my invention to provide improved means for connecting such tools with the frame.

To this end I arrange in combination means adapted to absorb torsional, and means adapted to absorb bending stress for supporting such tools.

My invention will be described and illustrated as adapted to a plough. In ploughs as in any other agricultural implements low weight is important as such implements must often be transported and obviously the tractive effort required is increased, and the facility of handling the implement is reduced, as the weight increases.

By providing the combined torsion and bending means aforesaid, the strength of the construction is increased very much without unduly increasing its weight.

In the drawing affixed to this specification and forming part thereof part of a plough frame to which my invention has been adapted is illustrated diagrammatically by wa of example.

In the drawing Fig. 1 is an elevation,

Fig. 2 is a plan view of the frame, and

Fig. 3 is a section on the line 33 in Fig. 2.

Referring now to the drawing, a are three parallel bars of the frame which are connected by suitable transverse stays h. b is a tubular brace which is arranged above the bars a at an angle to the foreand aft-direction, and c are parts resembling gusset plates which are welded or otherwise secured to the tube 6 by means of lugs f and g which engage the tube at opposite sides. The body of each plate 0 is arranged in parallelwith the adjacent bar a and secured thereto, as shown in dotted lines in Fig. 2. Each bar a is curved to the rear at 2', as shown in dotted 468,021, and :in Germany Aprll 18, 1929.

lines in-Fig. 1. The curved portion is riveted or otherwise connected to the adjacent gusset plate 0 and with its lower endproects beyond the gusset plate 0 for supporting the share d. A vertical brace 6 extends from sort of lattice work which braces the sys 6o tem against lateral deformation without un-- duly increasing its weight.

The resistance acting on'each share ex-v erts thereon-a pressure which as indicated at W in Fig. 2 is substantially horizontal 5 and inclined at an acute angle to the foreand aft-direction of the plough. The pressure W is split up into two components W and W the component W extending in parallel to the foreand aft-direction and the component W extending at right anglesthereto. It is very difficult to brace the frame against these two components without unduly increasing its weight. The stresses resulting from the component W can easily be taken care of by providing sectioned bars a as shown, or bars of rectangular cross section set on edge but sections which are suitable in this respect are weak against torsion and therefore must be made very by the lattice-work construction according to my invention. The plates 0 and the braces 0, being welded to the tube 9 transmit to such tube the torque from the component W The tube combines high torsional strength with low weight. By securing the lugs f and g at the upper end of each plate 0 to opposite sides of the tube 3) the stresses resulting from the component W are also partly transmitted to the tube and by these means the w plough frame is relieved of stress at the points where such stress might deform it.

I wish it to be understood that I do not desire to be limited to the exact details of construction shown and described for obmm SACK, ornnrrzre,

vious modifications Will occur to a person skilled in the art.

In the claims aflixed to this specification no selection of any particular modification of the invention is intended to the exclusion of other modifications thereof and the right to subsequently make claim to any modification not covered by these claims is expressly reserved.

I claim 1. In a frame for an agricultural implement, the combination of a plurality of spaced beams, ground-Working tools supported by said beams, a transversely positioned torsional member connected to said beams, a gusset plate connected to each beam at one end and having lugs at its other end for engaging opposite sides of said torsional mem ber, and bracing means connecting each of said tools to said torsional member.

2. In a frame for an agricultural implement, the combination of a plurality of spaced beams, ground-working tools supported by said beams, a transversely positioned torsional member connected to said beams, a gusset plate connected to each beam at one end and having lugs at its other end for engaging opposite sides of said torsional membeijand braces each secured to said torsional member at one end and to a respective tool at the other end.

In testimony whereof I aflix my signature.

WERNER SCHIRMER. 

